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The GNUstep base library provides functions and macros to do all the
most common geometry operations on NSPoints, NSSizes
and NSRects (such as determining if a point is contained in a
rectangle, computing the intersection of two rectangles, etc). It
would be off topic to discuss them here; please refer to the base
library documentation whenever you need to do some of these common
geometrical operations.
Nicola Pero
2000-07-29